Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What customer action needs to take place to mitigate the vulnerability?
Customers should install the latest version of the Windows Admin Center extension through the Azure Portal. There is no direct download link; instead, customers need to open the Extensions + Applications blade for their virtual machine in the Azure Portal and search for the extension named AdminCenter (Microsoft.AdminCenter.AdminCenter). From there, they can add or update the extension following the standard Azure VM extension installation process described here.
What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
Security updates
2.6.4 — https://aka.ms/wac2511
Vulnerabilities 1
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High 7.8
Windows Admin Center in Azure Portal Elevation of Privilege Vulnerability
Improper access control in Azure Portal Windows Admin Center allows an authorized attacker to elevate privileges locally.
Revision history
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#1
Information published.
References
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CVE-2026-23660 Windows Admin Center in Azure Portal Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23660
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss